Synthesis of 1-Substituted 1<i>H</i>-1,2,3,4-Tetrazoles Using Biosynthesized Ag/Sodium Borosilicate Nanocomposite

Nasrollahzadeh, Mahmoud; Sajjadi, Mohaddeseh; Tahsili, Mohammad Reza; Shokouhimehr, Mohammadreza; Varma, Rajender S.

doi:10.1021/acsomega.9b00800

Cited by 44 publications

(19 citation statements)

References 65 publications

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“…According to UV–vis spectroscopy of the mixture after 24 h of incubation, the maximum observed peak in this study was at 415 nm, which is closely related to spherically shaped NPs [ 39 ]. The optimum peaks for green-synthesized Ag-NPs are in the range of 400–460 nm, which is the corresponding absorption range of SPR for Ag-NPs ( Figure 2 A) [ 40 , 41 ]. The brownish or yellowish-brown color is formed as a result of excitation of surface plasmon resonance, which is particular for Ag-NPs as recommended previously [ 9 , 21 , 42 ].…”

Section: Resultsmentioning

confidence: 99%

Bactericidal and In-Vitro Cytotoxic Efficacy of Silver Nanoparticles (Ag-NPs) Fabricated by Endophytic Actinomycetes and Their Use as Coating for the Textile Fabrics

et al. 2020

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An endophytic strain of Streptomyces antimycoticus L-1 was isolated from healthy medicinal plant leaves of Mentha longifolia L. and used for the green synthesis of silver nanoparticles (Ag-NPs), through the use of secreted enzymes and proteins. UV–vis spectroscopy, Fourier-transform infrared (FT-IR), transmission electron microscopy (TEM), X-ray diffraction (XRD), and dynamic light scattering (DLS) analyses of the Ag-NPs were carried out. The XRD, TEM, and FT-IR analysis results demonstrated the successful biosynthesis of crystalline, spherical Ag-NPs with a particle size of 13–40 nm. Further, the stability of the Ag-NPs was assessed by detecting the surface Plasmon resonance (SPR) at 415 nm for one month or by measuring the NPs surface charge (−19.2 mV) by zeta potential analysis (ζ). The green-synthesized Ag-NPs exhibited broad-spectrum antibacterial activity at different concentrations (6.25–100 ppm) against the pathogens Staphylococcus aureus, Bacillus subtilis Pseudomonas aeruginosa, Escherichia coli, and Salmonella typhimurium with a clear inhibition zone ranging from (9.5 ± 0.4) nm to (21.7 ± 1.0) mm. Furthermore, the green-synthesized Ag-NPs displayed high efficacy against the Caco-2 cancerous cell line (the half maximal inhibitory concentration (IC50) = 5.7 ± 0.2 ppm). With respect to antibacterial and in-vitro cytotoxicity analyses, the Ag-NPs concentration of 100 ppm was selected as a safe dose for loading onto cotton fabrics. The scanning electron microscopy connected with energy-dispersive X-ray spectroscopy (SEM-EDX) for the nano-finished fabrics showed the distribution of Ag-NPs as 2% of the total fabric elements. Moreover, the nano-finished fabrics exhibited more activity against pathogenic Gram-positive and Gram-negative bacteria, even after 10 washing cycles, indicating the stability of the treated fabrics.

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Section: Resultsmentioning

confidence: 99%

Bactericidal and In-Vitro Cytotoxic Efficacy of Silver Nanoparticles (Ag-NPs) Fabricated by Endophytic Actinomycetes and Their Use as Coating for the Textile Fabrics

et al. 2020

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“…A solvent free approach for the synthesis of 1‐substituted tetrazoles were reported using sodium borosilcate glass‐supported silver nanoparticle nanocomposite catalyst systems . These nanocomposite systems were obtained by A. Moluccana extract from leaves and hence deemed environmentally friendly, because such catalytic systems are free from use of organic solvents.…”

Section: Catalysis Using Silver Nanoparticle Systemsmentioning

confidence: 99%

Synthetic Organic Transformations of Transition‐Metal Nanoparticles as Propitious Catalysts: A Review

Ganesh

Ramakrishna

2020

Asian J Org Chem

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Nanotechnology has produced compelling evidences in the field of catalysis, construction, electronics, energy, food, imaging, medical, packaging, pharmaceutical sectors and in water treatment. Nanoparticles of transition metal origin are enticing in catalytic applications due to their lowlying empty orbitals for bonding and can offer a distinct ability to expand the coordination sphere. This coupled with ease of synthesis, recyclability and occurrence in abundance staples them as unique industrial materials. Transition metals such as Gold, Palladium, Silver, Copper, Iron, Ruthenium, Rhodium and hetero-bimetallic versions have been in demand for various organic transformations. The sharp rise in number of literature reports justifies the stand in catalytic property. A unique ability to form Covalent and/or Van der Waals interactions with solid supports and activate the substrates through close functional group interactions renders them as effective entities in organic transformations. In this review, we present the new developments in this niche in the past five years with a retreat on the mechanistic aspects along with parameters involved in nanoparticle characterizations through advances in spectroscopy.

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“…As a result, a high catalytic activity and eventually a semi-homogeneous system can be attained [5][6][7]. In addition, the easy separation and reuse of the nanocatalysts is a very important feature of such catalytic systems, which ultimately results in the clean preparation of pure products [8][9][10], although most unsupported nanocatalysts have several drawbacks, namely their separation and reuse from the reaction mixture. The leftover nanocatalytic residues may have deleterious effects in the production of fine chemicals and pharmaceuticals [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Palladium Nanocatalysts on Hydroxyapatite: Green Oxidation of Alcohols and Reduction of Nitroarenes in Water

Shokouhimehr¹,

Yek²,

Nasrollahzadeh³

et al. 2019

Applied Sciences

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A green procedure is described for supporting Pd nanoparticles on hydroxyapatite (HAP), which serves as a highly-stable heterogeneous catalyst displaying excellent activity for the aqueous expeditious reduction of nitroaromatics to the corresponding amines with sodium borohydride, and oxidation of primary and secondary alcohols by hydrogen peroxide with high yields and selectivities. The structural features of the prepared catalyst are confirmed by latest techniques including field emission scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The reusability of the heterogeneous catalyst was affirmed in the aqueous reduction of nitrobenzene and oxidation of cycloheptanol for six consecutive runs without significant loss of catalytic activity.

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Synthesis of 1-Substituted 1H-1,2,3,4-Tetrazoles Using Biosynthesized Ag/Sodium Borosilicate Nanocomposite

Cited by 44 publications

References 65 publications

Bactericidal and In-Vitro Cytotoxic Efficacy of Silver Nanoparticles (Ag-NPs) Fabricated by Endophytic Actinomycetes and Their Use as Coating for the Textile Fabrics

Bactericidal and In-Vitro Cytotoxic Efficacy of Silver Nanoparticles (Ag-NPs) Fabricated by Endophytic Actinomycetes and Their Use as Coating for the Textile Fabrics

Synthetic Organic Transformations of Transition‐Metal Nanoparticles as Propitious Catalysts: A Review

Palladium Nanocatalysts on Hydroxyapatite: Green Oxidation of Alcohols and Reduction of Nitroarenes in Water

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